Her bedroom remains littered with Barbie dolls from the Christmas Day playtime she missed with her nieces.

Her mum, who describes her as an "innocent young girl", has the backyard pool set up awaiting her return for a dip with her young nieces.

"She's not rebellious at all," Corinna Smith said. "If she's not here at home watching movies, she is at a girlfriend's house.

"She's not street-smart. She has really only just started going out in the past six months.

"She's only been out a couple of times and she hasn't enjoyed it at all. She doesn't even own a pair of heels. She gets around in sneakers and trackie pants.

"She is family-orientated and to not be in contact with us is just so out of character for her . . . it's just not what she would do."

Sister Alex says the girls are very close.

"When there's trouble we all swarm together," she said.

Rachael's father, Paul Moritz, has told police he thinks she rang him on New Year's Day - but he cannot be sure as the conversation was not what he would have expected from the daughter described by her big sisters as "daddy's girl".

Her brother has comforted sisters Emmah and Alex, reassuring them that their little sister is resilient and smart. "She's not doing something silly, she's not just playing a game," he told his sisters.

They all remain optimistic Rachael will be home safe soon.

SEARCH FOR A DAUGHTER

December 23: Rachael leaves her Reynella home with her father, Paul Moritz, saying she is going to stay with a friend at Greenacres for a couple of days.

December 24: Rachael fails to show at a scheduled family gathering.

December 25: She does not return home for Christmas. Her phone is switched off.

December 26: Rachael misses another family gathering.

December 27: Unconfirmed sightings of Rachael at Morphett Vale and Wallaroo.

December 29: Moritz family launch Facebook Missing Person page. Corrina Smith phones police to report her daughter missing. Rachael's mobile phone is on for a short time but she does not answer calls.

December 30: Rachael does not return home for her 20th birthday. Her phone is switched off shortly after one of her sisters sends her a text message asking her to contact them.

December 31: Adelaidenow reports on the Moritz family's Facebook search for Rachael, which is being followed by thousands of people.

January 1: Paul Moritz receives a brief call - apparently from Rachael - saying she is safe and well before hanging up.

January 2: Police reveal information about the call. Moritz family believes the call may have been a hoax, made under duress or tape-recorded.

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